[deldakota]

2001 4.7l dakota, is pulling up these codes, po155 is an 02 sensor problem but there is 4 of them...how can you tell which one it is......po51 im not sure about...any ideas???...thanks

 

[HemiDak]

There's only two O2 sensors; one before the cat, and one after. Your problem is with the first one. Looks like you'll need to replace it from the codes.

 

[bonicjar]

The 01-05 daks and durangos have 4 O2 sensors.